How to Extract Calcium From Limestone Ores | Sciencing
Apr 24, 2017· How to Extract Calcium From Limestone Ores. Reduce the limestone ore to a fine powder and add dilute hydrochloric acid. This will cause the limestone to give off carbon dioxide and increase the purity of the calcium carbonate. Filter this mixture to remove the remaining silica and other insoluble material. Add oxalic acid, or H2C204,...